Building walls Quotes

During the next thirty years the pole-ward migration of populations continued. A few fortified cities defied the rising water-levels and the encroaching jungles, building elaborate sea-walls around their perimeters, but one by one these were breached. Only within the former Arctic and Antarctic Circles was life tolerable. The oblique incidence of the sun’s rays provided a shield against the more powerful radiation. Cities on higher ground in mountainous areas nearer the Equator had been abandoned, despite their cooler temperatures, because of the diminished atmospheric protection

J. G. Ballard

Eachschool can, once again, become what it was always meant to be a building that has four walls with tomorrow inside.

John Akers

You're mistaken: men of sense often learn from their enemies. Prudence is the best safeguard. This principle cannot be learned from a friend, but an enemy extorts it immediately. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war. And this lesson saves their children, their homes, and their properties.
It appears then that it will be better for us to hear what they have to say first; for one may learn something at times even from one's enemies.